code: def save(self):
      json.dump(self.net_str2id, open(self.str2id_path, "w"), indent=4)
      json.dump(self.net_id2val, open(self.id2val_path, "w"), indent=4)
  
imports: import os
  import subprocess
  import json
  import pickle
  import numpy
  from ..data_providers.utils import get_data_provider_by_name
  from .expdir_monitor import ExpdirMonitor
  from ..expdir_monitor import distributed
label_desc: Use image node_id 8 for calling the NetPool obj's underlying member method code with example usage: obj.save() without return types